Those rebels really are modest. They say that they have captured Terok Nor. Yet since we never see Bajor in the background during this episode, they must have actually stolen the station! That's mighty impressive!

Great Moment :

The Defiant in battle. One tough little ship!

Plotline

When the Jennifer Sisko from the Mirror universe pays a visit to Deep Space Nine and convinces Jake to return with her, Sisko follows to find that the Rebels have captured Terok Nor and built a copy of the Defiant from blueprints O'Brien stole during "Through The Looking Glass" (episode 64, tape 3.10). Now the Klingons are sending an armada to retake the station, and Sisko must get the Defiant ready and pilot her into battle against a ship hundreds of times larger.